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Perle, George (1990). The Listening Composer, p. 21. California: University of California Press. ISBN 0-520-06991-9. /wiki/George_Perle
Perle, George (1990). The Listening Composer, p. 21. California: University of California Press. ISBN 0-520-06991-9. /wiki/George_Perle
Perle, George (1996). Twelve-Tone Tonality, p. 7. ISBN 0-520-20142-6. /wiki/ISBN_(identifier)
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